﻿using Microsoft.AspNetCore.Http;

namespace Admin.NET.Core
{
    public static class IPUtil
    {
        /// <summary>
        /// 获取请求的ip4
        /// </summary>
        /// <param name="context"></param>
        /// <returns></returns>
        public static string GetRequestIPv4(this HttpContext context)
        {
            string ip = string.Empty;
            if (context.Connection.RemoteIpAddress != null)
            {
                if (context.Request.Headers.ContainsKey("X-Real-IP"))
                {
                    ip = context.Request.Headers["X-Real-IP"].FirstOrDefault();
                }
                if (context.Request.Headers.ContainsKey("X-Forwarded-For"))
                {
                    ip = context.Request.Headers["X-Forwarded-For"].FirstOrDefault();
                }
                if (string.IsNullOrEmpty(ip))
                {
                    ip = context.Connection.RemoteIpAddress?.MapToIPv4()?.ToString();
                }
            }
            return ip;
        }
    }
}